Rock oysters, also known as Pacific oysters or Crassostrea gigas, are a type of bivalve mollusk found in coastal waters around the world. They thrive in intertidal zones and are often cultivated in oyster farms for their meat and pearls. Rock oysters have a rough, irregular shell that can vary in color, typically ranging from gray to brown. These oysters are popular in culinary dishes and are often served raw on the half shell, grilled, or baked. They are known for their briny flavor and are a good source of protein, vitamins, and minerals, making them a nutritious seafood choice.